The first Foursquare check-in from space was completed by astronaut Douglas Wheelock just the other day. In a world of PR and viral marketing it has become quite a bit harder to get heard, so when you can blast a message from space you know the world will tune in. While Foursquare battles the location based check-in war, it seems they just got a massive PR spike thanks to this interesting event. Gizmodo broke the news for most and it...